standardnotes-app-web/app/assets/javascripts/app/controllers/home.js

angular.module('app')
.controller('HomeCtrl', function ($scope, $location, $rootScope, $timeout, modelManager,
  dbManager, syncManager, authManager, themeManager, passcodeManager, storageManager, migrationManager) {

    storageManager.initialize(passcodeManager.hasPasscode(), authManager.isEphemeralSession());

    try {
      $scope.platform = function() {
        var platform = navigator.platform.toLowerCase();
        var trimmed = "";
        if(platform.indexOf("mac") !== -1) {
          trimmed = "mac";
        } else if(platform.indexOf("win") !== -1) {
          trimmed = "windows";
        } if(platform.indexOf("linux") !== -1) {
          trimmed = "linux";
        }

        return trimmed + (isDesktopApplication() ? "-desktop" : "-web");
      }();
    } catch (e) {}

    $scope.onUpdateAvailable = function(version) {
      $rootScope.$broadcast('new-update-available', version);
    }

    /* Used to avoid circular dependencies where syncManager cannot be imported but rootScope can */
    $rootScope.sync = function(source) {
      syncManager.sync();
    }

    $rootScope.lockApplication = function() {
      // Reloading wipes current objects from memory
      window.location.reload();
    }

    function load() {
      // pass keys to storageManager to decrypt storage
      // Update: Wait, why? passcodeManager already handles this.
      // storageManager.setKeys(passcodeManager.keys());

      openDatabase();
      // Retrieve local data and begin sycing timer
      initiateSync();
      // Configure "All" psuedo-tag
      loadAllTag();
      // Configure "Archived" psuedo-tag
      loadArchivedTag();
    }

    if(passcodeManager.isLocked()) {
      $scope.needsUnlock = true;
    } else {
      load();
    }

    $scope.onSuccessfulUnlock = function() {
      $timeout(() => {
        $scope.needsUnlock = false;
        load();
      })
    }

    function openDatabase() {
      dbManager.setLocked(false);
      dbManager.openDatabase(null, function() {
        // new database, delete syncToken so that items can be refetched entirely from server
        syncManager.clearSyncToken();
        syncManager.sync();
      })
    }

    function initiateSync() {
      authManager.loadInitialData();

      syncManager.setKeyRequestHandler(async () => {
        let offline = authManager.offline();
        let auth_params = offline ? passcodeManager.passcodeAuthParams() : await authManager.getAuthParams();
        let keys = offline ? passcodeManager.keys() : await authManager.keys();
        return {
          keys: keys,
          offline: offline,
          auth_params: auth_params
        }
      });

      syncManager.addEventHandler((syncEvent, data) => {
        $rootScope.$broadcast(syncEvent, data || {});

        if(syncEvent == "sync-session-invalid") {
          alert("Your session has expired. New changes will not be pulled in. Please sign out and sign back in to refresh your session.");
        }
      });

      syncManager.loadLocalItems().then(() => {
        $timeout(() => {
          $scope.allTag.didLoad = true;
          $rootScope.$broadcast("initial-data-loaded");
        })

        syncManager.sync();
        // refresh every 30s
        setInterval(function () {
          syncManager.sync();
        }, 30000);
      });
    }

    function loadAllTag() {
      var allTag = new SNTag({content: {title: "All"}});
      allTag.all = true;
      allTag.needsLoad = true;
      $scope.allTag = allTag;
      $scope.tags = modelManager.tags;
      $scope.allTag.notes = modelManager.notes;
    }

    function loadArchivedTag() {
      var archiveTag = new SNSmartTag({content: {title: "Archived", predicate: ["archived", "=", true]}});
      Object.defineProperty(archiveTag, "notes", {
         get: () => {
           return modelManager.notesMatchingPredicate(archiveTag.content.predicate);
         }
      });
      $scope.archiveTag = archiveTag;
    }

    /*
    Editor Callbacks
    */

    $scope.updateTagsForNote = function(note, stringTags) {
      var toRemove = [];
      for(var tag of note.tags) {
        if(stringTags.indexOf(tag.title) === -1) {
          // remove this tag
          toRemove.push(tag);
        }
      }

      for(var tagToRemove of toRemove) {
        tagToRemove.removeItemAsRelationship(note);
        tagToRemove.setDirty(true);
      }

      var tags = [];
      for(var tagString of stringTags) {
        var existingRelationship = _.find(note.tags, {title: tagString});
        if(!existingRelationship) {
          tags.push(modelManager.findOrCreateTagByTitle(tagString));
        }
      }

      for(var tag of tags) {
        tag.addItemAsRelationship(note);
        tag.setDirty(true);
      }

      syncManager.sync();
    }

    /*
    Tags Ctrl Callbacks
    */

    $scope.tagsSelectionMade = function(tag) {
      // If a tag is selected twice, then the needed dummy note is removed.
      // So we perform this check.
      if($scope.selectedTag && tag && $scope.selectedTag.uuid == tag.uuid) {
        return;
      }

      if($scope.selectedNote && $scope.selectedNote.dummy) {
        modelManager.removeItemLocally($scope.selectedNote);
        $scope.selectedNote = null;
      }

      $scope.selectedTag = tag;
    }

    $scope.tagsAddNew = function(tag) {
      modelManager.addItem(tag);
    }

    $scope.tagsSave = function(tag, callback) {
      if(!tag.title || tag.title.length == 0) {
        $scope.removeTag(tag);
        return;
      }
      tag.setDirty(true);
      syncManager.sync().then(callback);
      modelManager.resortTag(tag);
    }

    /*
    Notes Ctrl Callbacks
    */

    $scope.removeTag = function(tag) {
      if(confirm("Are you sure you want to delete this tag? Note: deleting a tag will not delete its notes.")) {
        modelManager.setItemToBeDeleted(tag);
        // if no more notes, delete tag
        syncManager.sync().then(() => {
          // force scope tags to update on sub directives
          $scope.safeApply();
        });
      }
    }

    $scope.notesSelectionMade = function(note) {
      $scope.selectedNote = note;
    }

    $scope.notesAddNew = function(note) {
      modelManager.addItem(note);

      if(!$scope.selectedTag.all && !$scope.selectedTag.isSmartTag()) {
        $scope.selectedTag.addItemAsRelationship(note);
        $scope.selectedTag.setDirty(true);
      }
    }

    /*
    Shared Callbacks
    */

    $scope.safeApply = function(fn) {
      var phase = this.$root.$$phase;
      if(phase == '$apply' || phase == '$digest')
        this.$eval(fn);
      else
        this.$apply(fn);
    };

    $rootScope.notifyDelete = function() {
      $timeout(function() {
        $rootScope.$broadcast("noteDeleted");
      }.bind(this), 0);
    }

    $scope.deleteNote = function(note) {
      modelManager.setItemToBeDeleted(note);

      if(note == $scope.selectedNote) {
        $scope.selectedNote = null;
      }

      if(note.dummy) {
        modelManager.removeItemLocally(note);
        $rootScope.notifyDelete();
        return;
      }

      syncManager.sync().then(() => {
        if(authManager.offline()) {
          // when deleting items while ofline, we need to explictly tell angular to refresh UI
          setTimeout(function () {
            $rootScope.notifyDelete();
            $scope.safeApply();
          }, 50);
        } else {
          $timeout(() => {
            $rootScope.notifyDelete();
          });
        }
      });
    }



    // Handle Auto Sign In From URL

    function urlParam(key) {
      return $location.search()[key];
    }

    async function autoSignInFromParams() {
      var server = urlParam("server");
      var email = urlParam("email");
      var pw = urlParam("pw");

      if(!authManager.offline()) {
        // check if current account
        if(await syncManager.getServerURL() === server && authManager.user.email === email) {
          // already signed in, return
          return;
        } else {
          // sign out
          authManager.signout().then(() => {
            window.location.reload();
          });
        }
      } else {
        authManager.login(server, email, pw, false, false, {}).then((response) => {
          window.location.reload();
        })
      }
    }

    if(urlParam("server")) {
      autoSignInFromParams();
    }
});